Mr. Nice Nice (1997)? https://www.imdb.com/title/tt0117786/
This website describes Jackie Chan movie moments and his movies https://vocal.media/geeks/top-10-jackie-chan-moments and mentions a wheelbarrow:
Playing a TV Chef who inadvertently gets caught up with an Italian street gang, Chan is once again forced to rescue his girlfriend. Tracking them to a construction site, he battles the thugs in a maze of blue doors, before almost getting shredded by circular saws! In full Jackie Chan style, he uses a wide variety of unconventional objects to defend himself. Topping it all off, he’s eventually thrown off the building in a wheelbarrow!